brcmfmac: only lock and unlock fws if fws is not null

There is a null ptr check for fws to set bcmc_credit_check, however,
there a lock and unlock on fws should only performed if fwts is
also not null to also avoid a potential null pointer deference.

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
index ffdc7f8..e5f5fac 100644 (file)
--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwsignal.c
@@ -1609,10 +1609,11 @@ static int brcmf_fws_notify_bcmc_credit_support(struct brcmf_if *ifp,
 {
        struct brcmf_fws_info *fws = ifp->drvr->fws;
 
-       brcmf_fws_lock(fws);
-       if (fws)
+       if (fws) {
+               brcmf_fws_lock(fws);
                fws->bcmc_credit_check = true;
-       brcmf_fws_unlock(fws);
+               brcmf_fws_unlock(fws);
+       }
        return 0;
 }